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MA: Fachverband Magnetismus
MA 33: Altermagnets IV
MA 33.13: Vortrag
Mittwoch, 11. März 2026, 18:15–18:30, HSZ/0002
Odd-parity-wave spin-polarized multiferroics — •Jan Priessnitz, Johannes Mitscherling, and Libor Šmejkal — Max Planck Institute for Physics of Complex Systems, Dresden, Germany
Combining ferroelectricity with spin polarization in ferromagnets is difficult due to the poor compatibility of insulating band structures and ferromagnetism. Recently, an alternative strategy based on combining time-reversal-broken spin polarization in altermagnetic insulators and ferroelectricity into type-I multiferroics was suggested [1]. Here we propose a different strategy based on time-reversal-symmetric odd-parity-wave spin polarization, which we demonstrate in type-II multiferroics induced by noncollinear magnetism [2,3]. Via state-of-the-art spin group theory and first-principle calculations, we demonstrate the spin polarization in GdMn2O5, a type-II multiferroic material combining coplanar p-wave magnetic order with ferroelectric order. Furthermore, we propose the antialtermagnetoelectric effect – cross-coupling between ferroelectric and odd-parity-wave time-reversal-symmetric spin polarization. The calculated switching path, influenced by exchange fields and spin-orbit coupling, and consistent with previous studies of ferroelectricity in this material, connects two distinct magnetic states with opposite signs of both electric and spin polarization.
[1] L. Šmejkal, arXiv:2411.19928.
[2] A. Birk Hellenes et al., arXiv:2309.01607v3.
[3] A. Chakraborty et al., Nat Commun 16, 7270 (2025).
Keywords: p-wave magnets; multiferroics; ab initio; unconventional magnetism; spin group theory